Make layout test harness extensible with custom layout tests directory

third_party/WebKit/Tools/Scripts/webkitpy/layout_tests/port/test.py

 # Copyright (C) 2010 Google Inc. All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #     * Redistributions of source code must retain the above copyright
 # notice, this list of conditions and the following disclaimer.
 #     * Redistributions in binary form must reproduce the above
 # copyright notice, this list of conditions and the following disclaimer
@@ skipping 502 matching lines @@
     def stop_websocket_server(self):
         pass
 
     def release_http_lock(self):
         pass
 
     def path_to_apache(self):
         return "/usr/sbin/httpd"
 
     def path_to_apache_config_file(self):
-        return self._filesystem.join(self.layout_tests_dir(), 'http', 'conf', 'httpd.conf')
+        return self._filesystem.join(self.apache_config_directory(), 'httpd.conf')
 
     def path_to_generic_test_expectations_file(self):
         return self._generic_expectations_path
 
     def all_test_configurations(self):
         """Returns a sequence of the TestConfigurations the port supports."""
         # By default, we assume we want to test every graphics type in
         # every configuration on every system.
         test_configurations = []
         for version, architecture in self.all_systems:
@@ skipping 107 matching lines @@
         else:
             image = test.actual_image
         return DriverOutput(actual_text, image, test.actual_checksum, audio,
                             crash=(crash or web_process_crash), crashed_process_name=crashed_process_name,
                             crashed_pid=crashed_pid, crash_log=crash_log,
                             test_time=time.time() - start_time, timeout=test.timeout, error=test.error, pid=self.pid,
                             leak=test.leak)
 
     def stop(self):
         self.started = False